A new national survey finds former Vice President Joe Biden and Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.) statistically tied for the lead in the race to face President Trump in 2020.

The latest poll from Monmouth University finds Biden and Warren each receiving the support of 23 percent of respondents, with Sanders close behind at 20 percent. The survey of Democratic voters has a margin of error of plus or minus 5.3 percentage points, putting the top three candidates in a statistical dead heat.